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Reduction of Pathogen Indicator Organisms in Dairy Wastewater Using an Ecological Treatment System

^a Environmental Science Graduate Program, The Ohio State Univ., 590 Woody Hayes Dr., Columbus, OH, 43210
^b Dep. Veterinary Preventative Medicine, The Ohio State Univ., 1920 Coffey Rd., Columbus, OH, 43210
^c Dep. Food, Agricultural and Biological Engineering, The Ohio State Univ., 590 Woody Hayes Dr., Columbus, OH, 43210

View larger version (38K): [in this window] [in a new window]   Fig. 1. The Waterman Farm Ecological Treatment System (WETS) consists of two identical treatment lines that each receive diluted dairy wastewater at a rate of 0.35 m3 d–1 line–1. Vertical arrows indicate coliform sample locations.

View larger version (18K): [in this window] [in a new window]   Fig. 2. (a) Plot of eigenvectors for the first two principle components (PC), values in parenthesis indicate the contribution of the PC to the total variation in water quality. PC 2 is highly positively correlated with temperature. (b) Relationship of sample locations between the first two principle components produced in PCA. R5 = Clarifier 1, R9 = Clarifier 2.